2.1 root?

OK, so a couple of days ago I got the OTA update on my UK-sourced Milestone, which was previously rooted. After installation, I did a factory reset just to start with a fresh slate, but I find that I don't seem to have root (opened terminal emulator, typed SU, clicked yes when superuser whitelist popped up), but the cursor remains blank.

I'm not sure about te Milestone yet, but even te Droids REAL root exploit hasn't been uncovered yet I believe. But we still can put the su binary into bin and xbin and chmod them both. And then push the Superuser.apk into /system/app and it gives us root access. But from what I understand for some reason this isn't the full exploit or something like that...maybe someone else can answer better